Electrically-operated abrading-machine.



. N. G OLSON. ELECTRICALLY OPERATED ABRADING MACHINE. APPLICATION FILED JULY 18.1918.

1,295,359. Patented Feb. 25, 1919.

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ELECTRICALLY OPERATED ABRADING MACHINE.

I APPLICATION FILED JULY 18.1918. 1,295,359, Patented Feb. 25, 1919.

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N-ILS G. OLSON, OF CHICAGO, ILLINOIS.

ELEGTRICALLY-OPERATED ABRADING-MACHINE.

Application filed July 18, 1918. Serial No. 245,497.

by means of a roll, spindle disk or other suit- .able tool mounted on a rotatable shaftand faced with sandpaper, emery cloth, or other abra'ding peculiarities of the construction,- novel arrangement and operation of the various parts thereof as will be hereinafter more fully set forth and specifically claimed.-

One of the objectso fv the invention, is, to

provide a. machine of the above mentioned general character which shall be simple and inexpensive in construction, strong, durable, eflicient in operation, compact and portable in form and self driven, to the end, that it can be conveniently used as a unit bench ma chine, that is without connecting it up to power shafts bv counter-shafts, belts, pul-- leys and the like, as has heretofore generally been necessary in floor machines of the said type. Another object of the invention, is, to furnish an abrading or sandpapering machine of such construction that it can be used for vertical or horizontal operation. A

further object is to provide means for the ready interchanging of abrading tools or instruments used in connection therewith, so that articles of different sizes, shapes and construction can be operated upon with the highest degree of efliciency. Still another object, is, to provide means for reciprocal, as well as, rotary movement to the abrading tool, when reciprocal movement is desired.

Other objects and advantages of the invention will be disclosed in the 'subjoined description and explanation.

In the accompanying drawings, which serve to illustrate an embodiment of the invention,

Figure 1 is a plan view of the machine embodying one form of the invention.

Fig. 2 is a view in side elevation thereof.

Fig. 3 is a. fragmental vertical sectional Specification of Letters Patent.

material, and it consists in certain Patented'Eeb. 25, 19 19.

view taken on line 38 of Fig. 1 looking in the direction indicated by the arrows,

Fig. 4 is a View partly in section and partly in elevation of the rotatable parts of the machine showing a modification in the construction thereof and illustrating a part of the supporting table in section, and, Fig. is a fragmental view partly in section and partly in elevation showing a modification in the means of securing the tool head carrying sleeve to the motor shaft so that said sleeve can be reciprocated without rotary motion. I

- Like numerals of reference refer to corresponding parts throughout the different views of the drawings.

Referring now to Figs. 1 to 3 inclusive of the drawings, the-reference numeral 6 desigs na-tes an electric motor, the base of which is provided with a lateral extension or leg 7, which when the-motor is used for. vertical operation is adapted to lie on the bench or support, but when the machine is used for horizontal operation as will be presently explained, this leg or extension 7 willafford one' of the supports for the machine. As shown in the above mentioned figures of the drawings, the driving shaft 8 of the motor is extended vertically therefrom and may be of any desired length. Horizontally mounted on the upper portion of the motor 6 and surrounding the same is a frame' which is designated as a whole by the reference nu- Ineral 9, and has oppositely extended portions 10 and 11, the former of which isprovided near its outer end on one side thereof .with a clamping screw 12'tofit in the slot 13 of an adjusting arm 14 pivotally mounted at its upper end to the table 15 which is for the mounted. atone of its ends between the, prongs of the bracket 17 near the shaft 16' is a lever 18 which is extended inwardly or toward the driving shaft 8 of the motor and" is provided at its inner or'said end with-a yoke 19 each of the prongs of which is provided with an inwardly extended projection- 20 to fit and operate in an annular groove 21 formed on the outer surface of the sleeve 22 whichca'rries at its upper or outer end an internal screw threaded tool holder 23' of any suitable size. The lever 18 has at about its clearly ShOWIl lIl Figs. '2 and 3 of the drawings. Mounted on the shaft 16 near the wheel or disk 25 is a pulley 26 over which a belt 27 passes and connects said pulley to a pulley 28 keyed 'or fixed to the shaft 8 of the motor near its juncture therewith. The sleeve 22 which carries the tool holder 23,

as above stated, is keyed to the motor shaft 8 orconnected thereto in such a manner as to turn therewith but to reciprocate thereon and. as it is connected to the lever 18, by means of the projections 20 onthe yoke 19 of said lever and the groove 21 in said sleeve, it is obvious that in the rotation of the shaft 16 which is driven by the belt 27 "passin around the pulleys 26 and'28, the inclined wheel or disk 25 will cause. the lever 18 to oscillate on its fulcrum and thus move the sleeve 22 and its holder as well as the tool carried 'by. the latter back and forth while it. is being rotated by the shaft of the motor. Each of the prongs of the bracket 17 is provided at its inner portion with an upwardly extended arm 29 which arms are-located on opposite sides of the motor shaft. Pivotally mounted on the arms 29 by means of depending brackets 30 secured to the lower surface thereof is a' table ,31 for the support of the work, such as patterns and the like to. be operated-on by the machine. As is clearly shown in-Figs. 1, 3 and 4 of the drawings the table 31 is preferably rectangular in shape, at least it has its edge adjacent to the extension 7 on the base of the motor 6 strai ht and inregister with the outer end of said extension. It will also be observed by reference to said figures, that the table 31 is provided centrally withan opening having steps 32 and 33, see Figs. 3 and 4 of the drawings. The upper portion of this opening is for thereception of a, centrally apertured disk 34 when the machine is equipped with a small tool 35, as shown in Figs. 2 and versely with respect to the frame 9 is an adjustable board-37 used as a rest or support for the work being operated on, if desired. The ends of the board 37 are pivotally connected to the edges of the table 31 by means of screws and clamping nuts 38 mounted on said screws, the latter being extended through suitable brackets 39 onthe lower.

obvious that the table 31 can be adjusted to different angles and that the board 37 can so I also be adjusted to different angles with respect to the table. The tool 35 is provided on its lower end with a screw threaded head 35*, see Fig. 3, to engage the internal screw threads of the tool holder 23, by which arran'gement' it is obvious that tools of different sizes may be interchangeably used or connected to the holder 23 thus enabling pieces of work of difi'erent sizes'to be operated on. The tool 35 may be hollow, as

shown in Fig. 3, and faced both internally and externally with sandpaper or emery cloth 43 or any other suitable abrading material, so that when the pattern or article to' be smoothed or operated on is placed in the proper position either externally or internally of .the tool, the vertical and rotary movement of the latter will quickly grind off or smooth the portions of the pattern or piece of work as desired. I 5

Instead of using an upright tool 35, as shown in Figs. 1 to 3 inclusive of the drawings, I may employ a disk 36 faced with sandpaper or other abrading material and Having a screw threaded extension 44 to engage the tool holder 23, in which case it is obvious that the plate or disk 4-4 is removed from the openin in the table.

In the modided construction, shown in Fig. 4, it will be observed that the motor shaft 8 is much shorter-than that used in the construction illustrated in Figs. 1 to 3 inclusive and that the pulley 28 around which the belt 27 passes is made integrally with a sleeve 45 which fits around the shaft 8 and is fixed thereto by a set screw 46, and that in this construction the sleeve 22 which carries the tool. holder is keyed to the sleeve 45 but mounted for longitudinal movement thereon.

By providing the base of the motor 6 with a leg or extension 7, it. is apparent that the machine may be located in a horizontal position in which .case the edge of the table adjacent to the extension 7 on the base of. the motor w1ll act as oneof the supports for the machine whilesaid extension will act as the other, and it is manifest that the board 37 will be extended horizontally and will act as the table of the machine. By myshaft 16 and wheel 25 thereon will cease to operate, thus permitting the tool carrying sleeve to rotate only with the motor shaft.

In the event it is desired to reciprocate the abrading tool without rotating the same, I may employ a construction like that shown I in the modified form illustrated in Fig. 5 of the drawings. This modification consists in forming the motor shaft 8 with a longitudinal groove in its wallto receivethe inner end of a screw 47, which when seated with its inner end out of contact with theshaft 8 as shown in said figure, will act as a key and allow the sleeve 22 to be reciprocated without turning with said shaft as is obvious.

As will be observed in Fig. 2 of the drawings, a portion of the edges of the table 31 adjacent to the bars is provided with a longitudinal slot in which thescrews 38 and 41 are mov'ably located thus enabling the board 37 to be adjusted toward or from the tool as may be desired. The said slots may be dove-tail in cross section and the screws of a corresponding shape or enlarged at their inner ends to prevent their lateral displacement from said slots.

Having thus fully described my invention,

'- what I claim as new and desire to secure by the motor shaft and engaging said sleeve to' Letters Patent, is

1. In a machineof the class described, the combination with a motor, of an abrader carrying sleeve directly and slidably mounted on the power shaft of the motor for rotary movement with said shaft and for reciprocal movement thereon, and means operated by impart reciprocal movement to the latter.

2. In a machine of the class described, the combination of an electric motor, of a sleeve having a toolengaging head and directly and slidably mounted on the power shaft of the motor for rotary movement with said shaft and for reciprocal movement thereon, means operated by the motor shaft and engaging said sleeve to impart reciprocal movement thereon, means operated by the motor shaft and engaging said sleeve toimpart reciprocal movement to the latter, and

an abrading'tool detachably engaging said 1 head.

combination with an electric motor, of a frame mounted thereon and having a lateral 4. In a machine of the class'described, the

extension, an. arm or bracket extended near said extension, a driven shaft journaled on said arm and extension, a sleeve having a tool engaging head and mounted on the shaft of the motor for rotary and reciprocal movement, a lever fulcrumed on said arm and engaging said sleeve and having a re-v cess between its ends, a wheel diagonally ,mounted on the driven shaft and engaging the recess of .said lever, and means connecting the driven shaft and motor shaft to impart rotary movement to the former.

5. In a machine of the class described, the combination with an electric motor, of a frame mounted thereon and having opposed extensions, an arm or bracket extended near one of said extensions, a driven shaft journaled on said arm and extension, a sleeve having a tool engaging head mounted on the shaft of the motor for rotary and reciprocal movement, a lever fulcrumedon said arm and engaging said sleeve and having a recess between its ends, a wheel diagonally mounted on the driven shaft and engaging the recess of said lever, means connecting the driven shaft and motor shaft to impart rotary movement to the former, a table pivotally mounted on the frame and having an opening therein near said tool engaging head, means adjustably connecting the table and one of the extensions of the frame, and .an abrading tool detachably engaging said head.

6. In a machine of the class described, the combination with an electric motor having on its base an extension, of a frame mounted on the motor and having opposed extensions, an arm or bracket extended near one ofsaid extensions, a driven shaft journaled on said arm and extension, a sleeve having a tool engaging head mounted on the shaft of the motor for rotary and reciprocal movement, a lever fulcrumed on said arm and engaging said sleeve and having a recess between its ends, a wheel diagonally mounted on the-driven shaft and engaging the re-- cess of said lever, means connecting the driven shaft and motor shaft to impart rotary movement to the former, a table pivotally mounted on the frame and having van opening therein near said tool engaging head, one of the edges of said table being located in a plane with the outerend of the extension on the base of the motor, means adjustably connecting the table and one of the extensions of the frame,a board ad- ;justably mounted on the table nearthe openan extension'on its base, of a frame mounted. on the motor, a table pivotally mounted ing therein, and an abrading tool extended through the opening in the table and detachably engaging saidhead.

7. In a machine of the class described, the combination with an electric motor having on the frame, meansconnecting the table and frame for adjusting the former, said table having one of its edges in a plane With the outer end of the extenslon on the base of the motor, a board extended across the table and pivotally connected thereto, and means connecting the table and board for holding the latter in its adjusted positions.

NILS e. o -soN. 

